Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN: 9781337399074
Author: John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher: Cengage Learning
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Chapter 24, Problem 42SCQ

Which of the following statements is/are true?

  1. (a) Breaking the P—O bond in ATP is an exothermic process.
  2. (b) Making a new bond between the phosphorus atom in the phosphate group being cleaved off ATP and the Oil group of water is an exothermic process
  3. (c) Breaking bonds is an endothermic process.
  4. (d) The energy released in the hydrolysis of ATP may be used to run endothermic reactions in a cell.
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Running a mile in ten minutes burns between 100 and 120 calories for a 150-pound person. For the same run, a 200-pound person needs about 135-155 calories. In grams, how much ATP is required for this workout? ATP has a molecular mass of 507 g/mol. ATP's g-phosphate group hydrolysis has a free energy of -32 kJ/mol. One calorie is equal to 1000 calories, and one calorie is equal to 4.184 kilojoules (kJ). How much glucose do you need to fuel this run, both aerobically and anaerobically? Assume that one glucose molecule yields 30 ATP when processed aerobically. Molality of glucose is 180g/mol.
Overall, the hydrolysis of ATP is an exergonic reaction…it has a net release of energy. Which of the following is true regarding the hydrolysis of ATP: a) Bonds that are broken use more energy than the amount released by bonds that are forming. b) Bonds that are broken use less energy than the amount released by bonds that are forming.

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